<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <script src="lib/jquery-3.5.1.js"></script>

</head>
<body>

<a href="#" id="text-jquery">点我</a>

<script>
    $('#text-jquery').click(function () {
        alert('Hello, jQuery!');
    });
</script>

</body>
</html>